Oil-pump.



No. 786,167. PATENT W. S. SHERMAN.

01L PUMP.

APPLICATION 21mm JAN. 15. 1903.

UNITED STATES Patented March 28, 1905.

PATE T. OFFICE.

WILLIS S. SHERMAN, OF MILWAUKEE, WISCONSIN, ASSIGNOR TO SIGHT FEED OILPUMP (30., A CORPORATION OF WISCONSIN.

OIL-PUMP.

SPEQIFICATBZN forming part of Letters Patent No. 786,167, dated March28, 1905.

Application filed January 15, 1903. Serial No. 139,216.

To all whom it may concern:

Beitknown that I, WILLIS S. SHERMAN. residing at Milwaukee, in thecounty of Milwaukee and State of Wisconsin, have invented a new anduseful Improvement in Oil-Pumps, of which the following is adescription, reference being had to the accompanying drawings, which area part of this specification.

My invention has relation to improvements in oil-pumps for lubricatingpurposes.

The primary object of the invention is to provide a construction wherebythe different parts of the device are so disposed thatnot only is theutmost compactness in arrangement secured, but, furthermore, a saving inmetal, as well as in expense of manufacture and an advantage inlightness of weight are secured.

With the above primary object and other incidental objects in view theinvention consists of the devices and parts or their equivalents, ashereinafter more fully set forth.

In the accompanying drawings, Figure 1 is a side elevation of theinvention. Fig. 2 isa front view with parts broken away. Fig. 3 is avertical section on a plane through one of the sight-feeds, and Fig. Iis a horizontal section on the line 4 4 of Fig. 2.

Referring to thedrawings, the numeral 5 indicates the frame of the pump,which may, if desired, be constructed from a single casting. The frameis provided at its rear with projecting flanges 6, adapted to receivetherethrough bolts for securing the frame to asuitable supportingmedium. The top portion of the frame is intersected by .a passage 7,with one end of which an oil-inlet pipe 8'connects, said pipe leadingfrom any suitable source of oil-supply. Fitting in openings therefor atthe front and upper portion of the frame or casting are drip-nozzles 99. Each drip-nozzle is provided at its lower end with a dischargeorificewhich is controlled by means of an adjustable needle-valve 10, the lowerpointed end of which will enlarge or restrict the dichargeorifice of thenozzle in accordance with the particular movement given to the handle ofthe valve. The bore of each discharge-nozzle has a port 11 leadingtherefrom through the side of the nozzle and communicating wit-h abranch passage 12, leading from the oil-inlet passage 7. The upper endof atransparent sight-tube 13 surrounds the discharge-orifice atthelower end of each nozzle, and the lower end of each sight-tubeconnects with the upper end of an oil-chamber 14. Back of theoil-chambers 1 1 the frame or casting is formed with uprightplunger-chambers 15, in each of which is movably fitted a plunger 16.These plungers are reciprocated by means of teeth forming gear members17 17, said teeth being disposed around a shaft 18, which shaft extendsacross the frame or casting and across the oil-chambers 14, the innerwalls of said oil-chambers being recessed inwardly to accommodate aportion of the circumference of the shaft. The gear members 17 engagewith rack-teeth 19. formed on the plungers 16, and this engagement ismade possible by reason of openings 20 through the rear walls of theoil-chambers, which openings permit the teeth of the gear members toenter the plunger-chambers sufficiently far to engage the rack-teeth ofthe plungers. The lower end of each oil-cham ber 14 communicates witheach plunger-chamber a short distance above its lower end by a passage21. i

In the rear portion of the frame or casting are vertical outlet-passages22 22. To these passages are connected outlet-pipes 23 23, which lead tothe machinery to be lubricated. In the lower end of each outlet-passage22 are fitted valve-casings, the upper valve-casing being indicated bythe numeral 24 and'the lower valve-casing by the numeral 25. The uppervalve-casing of each pair is provided with a separate top piece 26,which fits against a shoulder 27, formed in the wall of the passage 22relating thereto. This top piece is provided with openings 28 for thepassage of the oil out of the upper valve-casing. The lower end of eachupper valve-casing 1s previded with diagonal ports 29, which converge toward their upper ends. Within the chamber of the upper valve-casing is aball-valve 30, which normally rests on a valve-seat 31. The lower end ofthe lower valve-casing tapers to the lower extremity thereof, and thistapered "portion is provided with diagonal ports 32,

/valve-cas1ng.

which converge toward their upper ends. The upper end of this lowervalve-casing is open andsbears against the lower end of the upper Withinthe interior chamber of the lower valve-casing is a ball-valve 33, whichnormally rests on a valve-seat 34.

The form of double valve-casing above described is quite desirable notonly from the consideration of convenience in inserting thevalve-casings in place, but also for other reasons. With reference toinserting these casings in place the ball valve of the uppervalve-casing is first placed in said casing, and the top piece 26 isthen adjusted to the upper end of the casing. The said casing is theninserted upwardly in its particular passage 22 from the lower end ofsaid passage until the top piece 26 contacts with the shoulder 27. Theball-valve 33 is then placed in the lower valve casing or section, andthis casing or section is then inserted into the said passage 22 fromthe lower end thereof and to the limit permitted by contact of the upperopen end of the lower valve-casing with the lower end of the uppervalve-casing. The two sections of valve-casing are then secured in placeby means of a screw-plug 35, which turns on interior threads formed atthe lower end of the wall of the passage 22, the said plug being turnedinwardly sufficiently far to cause its u pper end to contact with andbear firmly against the lower flat end 36 of the lower valve-casing.From the construction described it will be seen that not only are thetwo valve casings or sections readily inserted in place, but are alsocapable of being quickly removed whenever this is desirable merely byturning the screw-plug 35. The particular construction of the lower endsof the valve casings or sections equipped with the diagonal ports alsopossesses advantages. The diagonal ports of the lower valve-casingpermit the oil to flow freely into the interior of said casing. Ifstraight vertical ports were employed, the upper end of the screw-plug35 would close said ports against the entrance of the oil therein. Bymaking the ports diagonal, however, and providing the flat lowerextremity 36 the screw-plug can be turned up against said flat extremityWithout closing the ports referred to. The diagonal ports in the lowerend of the upper valve-casing also permit a free flow of the oil fromthelower valve-casing into said upper valve-casing even though the lowerballvalve 33 be raised against the lower end of the lower valve-casing,inasmuch as when said ball-valve is so raised it will contact with thesolid surface 37 which i s intermediate of the lower ends of thediagonal ports 29, and hence will not close the lower ends of saidports. The diagonal ports also effect another advantage in that theyprovide for an equal capacity of flow of oil through each valve-casingwithout increasing the size of the upper valve, the valve-casings, andscrew-plug, whereby a saving in cost is effected. It will be understood,of course, that the lower valve-casings have a capacity equal to theamount of oil that may be fed from the feed nozzle and that therefore itis unnecessary with the particular construction described to increasethe size of the upper valve-casings'and screws.

In oil-pumps in which the sight-tubes are composed of some transparentmaterial, such as glass, and which are used for the purpose of enablingthe operator to determine whether or not the drip-nozzles are drippingthe oil properly at all times some objection has existed by reason ofthe fact that the tranparent medium becomes clouded by oil or throughother causes, and hence the operator has difficulty in seeing whether ornot the nozzles are properly acting to drip the oil. It has been foundthat a plate of some reflecting mediumsuch as highly polished,burnished, or white enameled platearranged back of the transparentsight-tubes will render it possible for the operator to quickly seethrough said tubes even though they become clouded. I therefore show inconnection with the device a sheet of reflecting material, preferablyhighly polished or burnished or white enameled plate, arranged back ofthe sight-tubes and indicated in the accompanying drawings by thenumeral 38. It is desirable that this plate of reflecting material maybe movably disposed back of the sight-tubes, and to secure this Iarrange the upper and lower edges of said reflecting medium ingrooveways 39 39, and for the purpose of conveniently sliding thereflecting medium in or out I provide said medium with a projectinghandle 40.

For the purpose of rocking the shaft 18 so as to cause an up-and -downreciprocating movement to be imparted to the plungers I project one endof said shaft outwardly and connect thereto an arm or crank 41. This armor crank may be connected up in any 'desirable manner to some movablemechanism, so that the desired movement may be given to shaft 18. Iprefer that the connection shall be such that the extent of the rockingmovement of the shaft 18 may be readily regulated. For this purpose 1provide the crank or arm 41 with a transverse opening 42. This openingis adapted to receive a pin 43, said pin provided with an enlargement, aportion of the edge of said enlargement being curved, as indicated bythe numeral 44. The said curved edge fits against the shaft 18. Theouter end of the pin 43 is threaded, and this threaded extremityreceives a nut 45. By loosening the nut the crank or arm 41 can beadjusted at anyangle with relation to a given point on the shaft whichmay determine the extreme travel of one or the other end of the plunger.The nut is then tightened so as to draw the curved edge portion 44 ofthe pin tightly against the shaft 18,and thereby firmly lock the arm orcrank in its adjusted position.

The lower end of the arm or crank has projecting therefrom and fastthereto a circular lug 46, and mounted on this lug is an arm 47. Thisarm is intersected by an opening 48, in which is fitted a pin 49, saidpin being provided with an enlargement, and a portion of the edge of theenlargement is curved, as indicated by the numeral 50. The outer end ofpin 49 is threaded, and the threads receive a nut 51. nected thereto alink 52, and this link leads to and is connected with any desirablemovable mechanism which will effect, through the described connection, arocking motion of the shaft 18. It is evident that the position of thearm 47 may be changed in a similar manner to the position of the arm 41merely by loosening the nut 51 and then adjusting arm 47 to the desiredextent and then tightening the nut inwardly, so as to draw the curvededge 50 tightly against the lug 46 in order to hold arm 47 tightly inits adjusted position. In providing for the adjustment of the rockingmovement of the shaft 18if, for instance, it is desired to provide forthe maximum rocking movement of said shaft-the arm 47 is adjusted tosuch a position that it will be ad jacent to and parallel with the crankor arm 41, this being accomplished, of course, by loosening the nut 51and swinging the arm 47 to the position referred to and then tighteningthe nut 51. This adjustment will necessarily permit the shaft 18 to rockto the maximum extent. lf now it is desired to diminish the rockingmovement of the shaft 18, the nut is loosened. The arm 47 is then swungto the desired extent out of alinement with the arm 41 in order toobtain the required motion. The nut 45 is next loosened and the crank 41turned to such a position as to secure the proper travel of the plunger.The two nuts are then tightened, so as to hold the respective armsfixedly at the positions to which they have been adjusted. Thisadjustment of the parts will cause a decrease in the extent of therocking movement of the shaft 18, inasmuch as the said rocking movementis diminished as the distance of that end of the arm 47 to which thelink 52 is connected increases from the center of the shaft 18.

From the lower end of each plunger-chamber a passage 53 extends andcommunicates with the lower end of each outlet-passage 22, whereby theoil forced out of each plungerchamber is free to pass therefrom throughthe diagonal lower ports 32 and into the lower valve-casing of each pairof valve-casings.

In the operation of the invention the oil for lubricating purposes isfed by any desirable means through the inlet-pipe 8 and passes from saidpipe into the passage 7. From the latter passage it flows through thebranch passages 12, through the registering ports 11, and into thedrip-nozzles 9. The oil so fed discharges from the drip-nozzles andflows The outer end of arm 47 has con.

through the sight-tubes, entering the oilchambers 14, and from saidchambers passes through the passages 21 into the lower ends of theplunger-chambers 1,5. The rocking movement imparted to the shaft 18causes a vertical reciprocation of the plungers 16. On the 4 downwardmovementof said plungers the passages 21 are closed by the same, and theoil which is in the lower ends of the plunger-chambers is forced throughthe passages 53, through the diagonal ports 32, thence past the lowerball-valves 33, thence through the diagonal ports 29, past theball-valves 30,thence through the openings 28 in the top piece of theupper valve-casing, thence through the passages 22,

and finally through the pipes 28 to the machinery to be lubricated.

While I have herein shown and described the two plunger-chambers,sight-tubes, oilchambers, passages, &c., in conjunction therewith, yet Ido not wish to beunderstood as restricting myself thereto, inasmuch asonly one plunger-chamber, a plunger therein, and allied mechanism may beemployed or more than a duplicate set of such mechanisms may be providedwithout departing from the spirit and scope of my invention.

From the fact that the shaft 18 passes through the oil-chambers 14 itwill be evidentthat the ear members 17 are freely lubricated by the oilwhich is dripped into said chambers from the drip-nozzle. The said oilis also free to pass through the openings 20 into the plunger-chambers,so as to lubricate the upper ends of the plungers and the gear-teeth ofsaid plungers.

Instead of providing a continuous gear member for operating the plungersI prefer to provide two separate gear members, as shown .in the drawingsIf a continuous gear member were employed, the oil would flow along theteeth thereof and drip into the oilchamber. 14other than the particularchamber into which it should drip. It will be understood that the twogear members shown in the drawings are formed by cutting away the shaftbetween the twogear' members. This cutting away of the shaft necessarilyweakens said shaft, and particularly so where a number of feeds areemployed, and consequently a long shaft is required. In order tocompensate for this weakening, I mount on the shaft between the gearmembers a two-part bushing 54, which serves to prevent vibration orspringing of the shaft.

What I claim as my invention is 1. In an oil-pump, the combination of aframe provided with an oil-chamber and with a plunger-chamber havingcommunication at a point removed from its outer end with theoil-chamber, and said frame also provided with a valve-controlledoutlet-passage leading from theplunger-chamber, means for feeding oilinto the oil-chamber, means for conducting the oil from theoutlet-passage to the machinery ITO to be lubricated, a plunger in theplungerchamber and provided with teeth forming a rack, a shaft extendingacross the frame and through the oil-chamber and provided with shortgear-teeth therearound, said gear-teeth projecting through an opening inthe wall between the oil-chamber and the plunger-chamber and engagingthe rack-teeth of the plunger and the remainder of said teeth beinglocated in the oil-chamber, the metal of the shaft on one side of saidgear-teeth being cut away, and means for rocking the shaft.

2.1m an oil-pump, the combination of a frame provided with anoil-chamber and with a plunger-chamber having communication at a pointremoved from its outer end with the oil-chamber, and said frame alsoprovided with a valve-controlled outlet-passage leading from theplunger-chamber, means for feeding oil into the oil-chamber, means forconducting the oil from the outlet-passage to the machinery to belubricated, a plunger in the plungerchamber and provided with teethforming a rack, a shaft extending across the frame and through theoil-chamber, and provided with short gear-teeth therearound forming agear member which projects through an opening in the wall between theoil-chamber and the plunger-cham her, said gear member engaging therack-teeth of the plunger, the remainder of said gear member beingwithin the oil-chamber, and the metal of the shaft to one side of thegear member being cut away, a bushing mounted on the cut-away portion ofthe shaft, and means for rocking the shaft.

3. In an oil-pump, the combination of a frame provided withoil-chambers, and with plunger-chambers having communication at pointsremoved from their outer ends with the oil-chambers, and said frame alsoprovided with valve-controlled outlet-passages leading from theplunger-chambers, means for conducting the oil from the outlet-passagesto the machinery to be lubricated, plungers in the plunger-chambers andprovided with teeth forming racks, a shaft extending across the frameand through the oil-chambers and provided with separated gear memberslocated in the oil-chambers and projecting through openings in the wallbetween the oil-chambers and the plunger-chambers, and engaging therack-teeth of the plungers, the metal of the shaft between the gearmembers being cut away, the said cut-way portion being located betweenthe oil-chambers, and means for rocking the shaft.

4. In an oil-pump, the combination of a frame provided withoil-chambers, and with plunger-chambers having communication at pointsremoved from their outer ends with the oil-chambers, and said frame alsoprovided with valve-controlled outlet-passages leading from theplunger-chambers, means for feeding oil into the oil-chambers, means forconducting the oil from the outlet-passages to the machinery to belubricated, plungers in the plungerchambers provided with teeth formingracks, a shaft extending across the frame and through the oil-chambersand provided with separated gear-teeth forming separate gear memberslocated in the respective oilchambers and projecting through openings inthe wall between the oil-chambers and the plunger-chambers and engagingthe rack-teeth of the plungers, the metal of the shaft between the gearmembers being cut away, the said cut-away portion being located betweenthe oil-chambers, a bushing mounted on the cut-away portion of the shaftbetween the gear members and in the space betweenf'the' oil-chambers,and means for rocking the shaft.

5. In an oil-pump, the combination of a frame provided with anoil-chamber, a plunger-chamber, and a valve-controlled outlet passage,said oil-chamber, plunger-chamber, and outlet-passage being incommunication, means for conducting the lubricating-oil from theoil-passage to the machinery to be lubricated, a plunger in theplunger-chamber and provided with teeth forming a rack, a trans verseshaft provided with teeth forming a gear member meshing with the rack ofthe plunger, a crank connected to the shaft, means for adjusting theangle of the crank with respect to the shaft, an arm connected at oneend to the crank, means for changing the angle of said arm with respectto the crank, and a connection extending from the other end of said armand adapted to rock the arm and the crank.

6. In an oil-pump, the combination of a frame provided with anoil-chamber, a plunger-chamber, and a valve-controlled outletpassage,said oil-chamber, plunger-chamber, and outlet-passage being incommunication, means for conducting the lubricating-oil from the latterpassage to the machinery to be lubricated, a plunger in theplunger-chamber, provided with teeth forming a rack, a trans verse shaftprovided with teeth forming a gear member meshing with the rack of theplunger, a crank fitted on the end of the shaft, a pin passingthrough anopening in the crank, said pin provided with a curved shoulder bearingagainst the shaft, a nut on a threaded end of said pin adapted to drawsaid shoulder against the shaft, an arm fitted to a lug projecting fromthe crank, a pin -passing through the arm and provided with a curvedshoulder bearing against the lug, a nut turning on said pin and adaptedto draw the shoulder of the same against said lug, and a connectionextending from the arm and adapted to rock the same, together with thecrank.

7. In an oil-pump, the combination of a frame provided with anoil-outlet passage, and an oil-inlet passage, a drip-nozzle carried bythe frame and in communication with the oilinlet passage, a transparentsight-tube extending from the discharge end of the drip-nozzle,

forcing mechanism adapted to receive the oil dripped from thesight-tube, said forcing mechanism being constructed to force the oilfrom the outlet-passage to the machinery to be lubricated, and areflecting medium movably fitted in grooveways back of the sighttube,and a handle for moving said reflecting medium in and out in itsguideways.

8. In an oil-pump, the combination of a frame provided withplunger-chambers, and with means for feeding oil to and conducting thesame from said chambers, the plungers within the plunger-chambersprovided with gear-teeth forming racks, a shaft mounted in bearings inthe frame, said shaft having separated gear-teeth therearound formingseparate gear members meshing with the racks, the metal of the shaftbetween the gear members being cut away, and a bushing mounted on thecut-away portion of the shaft between the gear members.

In testimony whereof I affix my signature in presence of two witnesses.

WILLIS S. SHERMAN.

Witnesses:

U. T. BENEDICT, ALMA KLUG.

